So, I reload the page, and try to digg the article, or try to digg some comment up or down. Then, this happens:

After about a dozen reloads, I am finally able to digg a single comment. But once I try to digg another: "There was a problem completing your request. Please reload the page and try again."
And so the cycle begins anew.
Is it because I'm using Safari 3.1? (I get the same error messages in Firefox.) Is it because I have multiple tabs open with different Digg pages? Is it because Macs suck? Is it because Digg is inherently broken?
I tried to submit this blog post to Digg, and got:

This was later resolved by submitting in Firefox.
I love Digg, but constantly getting error messages when I actually try to use the site makes me wonder if I should start shopping around for an alternative social news service.
Any suggestions?